html {
  scroll-behavior: smooth;
}				
					#myBtn {
					  display: none;
					  position: fixed;
					  bottom: 20px;
					  left: 50px;
					  z-index: 99;
					  font-size: 18px;
					  border: none;
					  outline: none;
					  background-color: red;
					  color: white;
					  cursor: pointer;
					  padding: 15px;
					  border-radius: 4px;
					}
					
					#myBtn:hover {
					  background-color: red;
					}